Traverse roll



W. RElNERS TRAVERSE ROLL Feb. 10, 1942.

Filed March 9, 1940 2 Sheets-Sheet 2 INVENTOR; W/LHEL M R: we RS BY Z IA I ATTORNEYS Patented Feb. 10, 1942 TRAVERSE ROLL Wilhelm Reiners,Gladbach-Rheydt, Germany,

assignor to Schlafhorst & 00.,

Gladbach- Rheydt, Germany,a firm of Germany Application March 9, 1940,Serial No. 323,087

In Germany February 17, 1939 7 Claims.

This. invention relates to a traverse roll for winding yarn, thread,wire or similar strand materials.

The co-pending application for United States Letters Patent, Serial No.212,674, filed June 9, 1938, describes traversing means for windingmachines wherein the yarn is moved back and forth for the purpose ofwinding it in helical coils by two separate devices, one of which movesthe yarn in one direction, while the other causes a return movement ofthe yarn. The device which moves the yarn forward consists of a helicalgroove provided upon a traverse roll which may contact the cop, cone orpackage upon which the yarn is wound. The device which causes the returnmovement of the yarn consists of a thread guide which is situatedoutside of the space limited by planes extending through the sidesurfaces of the cop, cone or package. Both devices have been constructedon the basis of the principle that if a thread is tangentially guided toa rotating spindle, and if that part of the thread which is situated ata distance from the rotating spindle is shifted sidewise, then thethread will be wound upon the spindle in helical coils until it reachesa position situated directly opposite the point to which said part ofthethread has been shifted.

It Was found that these devices operate with great efficiency whencarrying out the so-called firm winding of cops and packages in thecourse of which the yarn, while being wound, is under a comparativelygreat tension and is pressed against a larger part of the circumferenceof the traverse roll. of using intersecting grooves and of specialcomplicated construction of the points in intersection. In severalinstances, however, it is necessary to wind the yarn softly or loosely,i. e. while subjecting it to a comparatively small tension. Looselywound packages or cops are required for instance, in the dye industry.

It was found that in the case of aloose winding, the thread guide doesnot always sufiice to cause the proper helical winding of the weaklytensioned yarn, and that sometimes, in spite of the proper position ofthe thread guide, the yarn does not follow the predetermined helicalpath upon the traverse roll in the course of the return movement. Thiscan also happen when the yarn is moved with a particularly great speed,when the traverse roll is of a comparatively small diameter, and/or hasa very smooth surface, or

when the yarn is slippery or highly greased.

These devices avoid the necessity vision of yarn winding means which areso constructed that the correct winding of the yarn will take place evenif the yarn is subjected to small tension.

A further object is to improve the construction described in theaforesaid patent application by the provision of additional meansenabling it to operate efiiciently in the courseof the return movementof the yarn.

Further objects of the present invention will become apparent in thecourse of the following specification.

The objects of the present invention may be realized by combining theaforesaid yarn-reciprocating means consisting of a single helical grooveprovided upon the traverse roll and a thread guide With an auxiliarydevice causing the yarn to wind itself in the form of proper spiralcoils in the course of its return movement.

In accordance with the present invention, this auxiliary devicecooperating with the thread guide, consists of a few projections oflight weight made, for instance, of hard metallo-ceramic materials.These projections may have the form of pins or the like, carried by thetraverse roll and situated on the sides of the path of the yarn upon thetraverse roll in the course of the correct return movement of the yarn,so that they act as abutments preventing the yarn from slipping.

In machines wherein the traverse roll is used for driving the bobbin,the pins may be resiliently mounted in bore holes provided in thetraverse roll, so that they are moved either partly or totally withinthe traverse roll while that part of the traverse roll wherein the pinsare located is moved into contact with the bobbin.

The invention will appear more clearly from the following detaileddescription when taken in connection with the accompanying drawingsshowing by Way of example preferred embodiments of the inventive idea.

In the drawings:

Figure 1 is the top view of a device constructed in accordance with theprinciples of the present invention and used for winding a bobbin;

Figure 2 is a front view of the device shown in Figure 1;

Figure 3 is a side elevation of the device shown in Figures 1 and 2; and

Figure 4 is a section through a part of a traverse roll shown in Figures1, 2 and 3.

The device shown in the drawings comprises a spool 20 having a support2| upon which the yarn or strand 22 is wound. This spool is wound upon abobbin 23 which includes a shaft 24 pivotally mounted upon a lever 40connected with a frame 28.

The bobbin 23 is driven by contact with the traverse roll 30, the outersurfaces of which may be made of a ceramic material, such a steatite orsoapstone.

The traverse roll is firmly connected with a shaft 3| which is mountedupon the frame 28. The shaft 3| is driven by any suitable mechanism (notshown) The spool 28 and the thread guide 29 which stretches the yarn 22are situated outside of the space which is limited by two planes passingthrough the two side surfaces of the bobbin 23 and diagrammaticallyindicated by the lines a:-a: and y-y respectively. As shown in Figure 2,the thread guide 29 may be situated close to the plane lJD passingthrough a side surface of the traverse roll 30.

A rod or abutment 33 is carried by the frame 28 and is used to limit thereturn stroke of the yarn 22.

The traverse roll 30 is provided with a groove 34 extending in the formof a single uninterrupted and unintersected helix substantially from oneside surface of the roll 30 to the opposite side surface. The end 35 ofthe groove 34 is in communication with a short groove 36 extending in anopposite direction to the groove 35 and constituting the means ofreversing the movement of the yarn 22.

The opposite end 3'! of the helical groove 34 is in communication withanother short groove 38 which extends in substantially the samedirection as the reversing groove 36 and which may be designated as thereceiving groove. The two grooves 36 and 38 are comparatively short.They do not have the form of a helix and in no way approach or intersectthe helical groove 34.

The form and other particulars of the grooves 34, 36, and 3B areimmaterial for the purposes of the present invention.

In accordance with the present invention, the traverse roll 30 isprovided with a few pins 4| having projecting conical portions 42 andmade of a metallo-ceramic material or the like. Each pin 4! is,preferably, of a circular cross-section and is situated in a bore hole43 enclosed by a sleeve 44. A spring 35 encloses the pins 4| and pressesagainst a plate 46 firmly connected with the pin and pressing againstthe edges 41 of the sleeve 44. The pins M are provided on the sides ofthe path of the yarn 22 upon the traverse roll 30 in the course of thereturn movement of the yarn. The pins project radially beyond the sidesurfaces of the roll 30 and are resiliently supported in this radialdirection by the springs 45.

In operation, the yarn 22 engages the end 31 of the helical groove 3dand due to the rotation of the roll 30. is guided by the groove 34 untilit completes its forward movement and reaches the end 35 of the groove34. Since the shaft 24 is rotated, the yarn 22 will be wound in the formof a helical coil upon the bobbin 23. Then the yarn is shifted from theend 35 of the groove 36 into the groove 36. Due to the location of andthe force exerted by the thread guide 29, the yarn 22 remains in aninclined position upon the roll 35 and is pulled out of the groove 36.Thereupon the yarn 22 carries out its return movement upon the smoothsurface of the roll. The pins il prevent the slipping of the yarn uponthe smooth surfaces of the traverse roll 33. Thus the proper winding ofthe yarn 22 upon the bobbin 23 in the form of intersecting helical coilswill be assured, even though the yarn is subjected to comparatively weaktension, so that the coils of the bobbin 23 are quite loose. The returnmovement of the yarn is terminated by the abutment 33. The yarn slipsinto the receiving groove 38 and is moved into the end 31 of the helicalgroove 34.

Each of the pins 4| may be substituted by a plurality of pins or otherprojections, balls or the like.

It is apparent that the specific illustration shown above has been givenby way of illustration and not by way of limitation and that thestructure above described is subject to wide variations andmodifications without departing from the scope or intent of the presentinvention.

What is claimed is:

1. Winding means, comprising in combination, a cylindrical rotarytraverse roll contacting a strand, a strand winding, said traverse rollhaving a helical groove formed therein for automatically shifting thestrand to be wound upon said winding from one side surface of thetraverse roll to the opposite side surface thereof, and at least oneprojection extending outwardly from the cylindrical surface of saidtraverse roll and located in the path of the strand during its returnmovement for guiding said strand in the course of its return movement;and means supplying the strand to the traverse roll and situated at oneside thereof to cause the return movement of the strand.

2. In winding machines, a traverse roll having a cylindrical surfaceadapted to contact a strand, a single uninterrupted and unintersectedhelical groove formed in said traverse roll for shifting the strandwhich is to be wound in helical coils upon a winding, from one end ofthe cylindrical surface of said traverse roll to the opposite endthereof, and at least one projection extending outwardly from thecylindrical surface of said traverse roll and located in the path of thestrand during its return movement for guiding said strand in the courseof its return movement to the first-mentioned end of said cylindricalsurface.

3. In winding machines, a traverse roll having a cylindrical surfaceadapted to contact a strand, a single helical groove formed in saidtraverse roll for shifting the strand which is to be wound in helicalcoils upon a winding, from one end of the cylindrical surface of saidtraverse roll to the opposite end thereof, and projections extendingoutwardly from said cylindrical surface and located close to the path ofsaid strand upon the traverse roll in the course of its return movementwhich is caused by an inclination of said strand relatively to saidtraverse roll.

4. In winding machines, a traverse roll having a cylindrical surfaceadapted to contact a strand, a single helical groove formed in saidtraverse roll for shifting the strand which is to be wound in helicalcoils upon a winding, from one end of the cylindrical surface of saidtraverse roll to the opposite end thereof, and projections extendingoutwardly from said cylindrical surface and located on the sides of thepath of said strand upon the traverse roll in the course of its returnmovement which is caused by an inclination of said strand relatively tosaid traverse roll.

5. Winding means, comprising in combination, a cylindrical rotarytraverse roll contacting a strand, a strand winding, said traverse rollhaving a helical groove formed therein for automatically shifting thestrand to be wound upon said winding from one side surface of thetraverse roll to the opposite side surface thereof, and at least oneprojection of circular cross-section extending outwardly from thecylindrical surface of said traverse roll and located in the path of thestrand during its return movement for guiding said strand in the courseof its return movement; and means supplying the strand to the traverseroll and situated at one side thereof to cause the return movement ofthe strand.

6. In winding machines, a traverse roll having a cylindrical surfaceadapted to contact a strand, a single uninterrupted and unintersectedhelical groove formed in said traverse roll for shifting the strandwhich is to be wound in helical coils upon a winding, from one end ofthe cylindrical surface of said traverse roll to the opposite endthereof, and at least one pin consisting of a metallo-ceramic materialand projecting beyond said cylindrical surface for guiding said strandin the course of its return movement to the first-mentioned end of saidcylindrical surface.

7. In winding machines, a traverse roll having a cylindrical surfaceadapted to contact a strand, a single uninterrupted and unintersectedhelical groove formed in said traverse roll for shifting the strandwhich is to be Wound in helical coils upon a winding, from one end ofthe cylindrical surface of said traverse roll to the opposite endthereof, at least one pin projecting radially beyond said cylindricalsurface for guiding said strand in the course of its return movement tothe first-mentioned end of said cylindrical surface, and meansresiliently supporting said pin in its radial direction.

WILHELM REINERS.

